Revenue Recognition - Schedule of Net Sales by Product Category (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	$ 2,007.6	$ 1,949.5	$ 4,025.2	$ 3,921.9
Knees [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	703.0	680.0	1,416.3	1,380.8
Hips [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	486.9	468.0	978.9	941.8
S.E.T [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	433.8	421.1	876.1	844.6
Dental [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	106.9	110.4	214.5	218.2
Spine and CMF [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	198.2	193.3	381.3	379.6
Other [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Net Sales	$ 78.8	$ 76.7	$ 158.1	$ 156.9